Attachment arm for supporting an object on a step ladder



FIG. 1 is a perspective view of a attachment arm for supporting an object on a step ladder.

FIG. 2 is a side view thereof, with the other side view being a mirror image.

FIG. 3 is a front view thereof.

FIG. 4 is a rear view thereof.

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof. 

The ornamental design for a attachment arm for supporting an object on a step ladder, as shown and described. 